Air valve



T. MELLOR.

AIR VALVE. FILED MAR- I9. 1920.

INVEN T E] R THUMASME'LL CIR.

P1 www ATTEJSBNEY Patented Dec. 26, 1922. v

THOMAS MELLOR,- OF CHICOPEE, MASSACHUSETTS.

AIR VALVE.

Application filed March 19.1920. Serial No. 367.178.

To. all whom it may concern:

Be it known'that Tr oMAs MELLoR, a subject of the King of England, residing at Chicopee, inthe county of Ha-mpden and State of Massachusetts, has'invented certain new and useful Improvements in Air Valves, of which thefollowing is a specification- This invention relates to improvements in air -valves for steam systems and particularly for rotating dryer cans or drums such as is generally used for drying textiles, paper and similar fabrics, and one of the objects of the invention is to provide a device of this character which will not project from the dryer or its associated steam connection in such manner as to endanger the operators or tobe exposed so as to be liable to disruption when subjected to the foot of a person walking across machinery or otherwise.

Another object of the invention is to provide an air valve for the above purpose having a cap member rotatable upon the nipple member and provided with ground meeting surfaces to insure a steam tight connection.

With the above and other objects in view this invention relates to certain new and useful constructions, combinations and arrangements of parts, clearly described in the following specification and fully illustrated in the accompanying drawings in which:

Figure 1 is a vertical sectional view.

Figure 2 is a top plan view.

Figure 3 is a top plan view of a joint cap.

Figure 4 is a vertical sectional view of a modified form. a

Figure 5 is a top plan view thereof.

Referring to the accompanying drawings 5 designates a nipple member having an externally threaded stem 6 capable of being connected in a threaded opening of a dryer can or other device. The member 5 is formed with a circular flange or head 7 having screw threads 7 formed on the inner portion thereof and provided with a ground surface 7 located outwardly of the thread 7. The member 5 is also formed with a reduced portion or extension 8 concentric withthe flange 7 and having a slightly tapered surface 8. The member 5 is formed with an axially passage 9 and with a passage 9 which extends at about right angles thereto and is located in the extension or portion 8.

On the extension or portion 8 a cup shaped member 10 is disposed which is formed with a tapered surface corresponding to the tapered surface 8 with which it is engaged and an external taperedsurface 10 engaged with a correspondingly tapered surface formed in the side wall 11 of the socket 11 formed in the cap member 12. The cap member 12 is formed with a ground surface 12 engaged with 'a similar surface7 formed onthe flange 7 of the nipple member 5 and is also provided witha ground surface 12 engaged with the ground surface 7 and has screw threaded engagement with the thread 7 of the flange 7, whereby the two members will be slightly united to each other for relative rotation. The joint cup 10 is formed with an air passage or opening 10 in its side wall which is maintained in positive registration with'the passage 9 by means of set screws or the like extended through openings 10 formed in the base of the joint cup 10 while the cap member 12 is formed with a passage 12 adapted to be moved into an outer registration with the passage 10 by manually turning the cap on the nipple member. In the position shown in Figure 1 the air passage 9 will be opened permitting air to be discharged under steam pressure. When the cap is turned so as to move the port 12 out of registration with the passage 9 discharge of steam will be prevented.

In Figures 4 and 5 I show a modified form of the invention consisting of a nipple member 14' having a threaded nipple or stem 15 and a circular flange 16 concentric with said stem 15. An extension 17 is formed on the member 14, similar to the extension 8 of the member. 5 and the external or peripheral surfaces of the flange 16 and the extension 17 are shown to have a slight taper. An air passage '18 is formed in the member 14 and has a lateral outlet portion 1S extending through the extension 17. A cap member 19 having. a socket 19 is mounted on the extension 17 and the flange 16 and the contacting surfaces are ground to provide a leak proof joint. The flange 20 of the cap member 19 is extended rearwardly of the flange 16 and provided with internal screw threads 21, the internal circumference of which is larger than the flange 16 so that the member 14 may be withdrawn from the cap 19 or inserted therein when desired. The nipple member 14 and the cap member 19 are retained in working relation by means of a ring 22 having threaded engagements with the screw threads 21 but spaced from the thread of the stem 15. By tightening the retaining ring :22 against the inner face 16 of the flange 16 the meeting faces'between the cap member and the nipple member will be maintained in leak proof contact. member 19 is formed with an air opening 19 adapted to be moved into registration with the passage 18 as in the previously described construction. When the nipple memher is threaded into the dryer or other steam device the ring 22 may be moved into frictional. locking engagement with the dryer or other device so as to prevent accidental rotation of the ring and yet permit of the manual rotation of the cap thereon. When the cap is rotated the ring 22 will rotate with it, without disturbing the retaining connection between the cap member and the nipple member. The ring 22 .is preferably formed The cap with pin sockets 22 whereby a spanner tool may be engaged therewith to adjust the same. I

Having described my invention, 1 claim: 1. An air valve comprising a body having a slightly tapered'relatively narrow ground valve and an externally threaded stem, the bot y having aradial flange located between the valve and the stem, said body having an opening exteiidingintothe stem and thence laterally through the valve, a relatively shallow housing having a restricted'air opening registerable with the lateralopening of the valve and providing'a ground taper seat for the valve and means the valve to its seat.

2; The device as set forthin claim 1,-the said means being a ring threaded into the housii'ig against the radial flange for adjustably holding the valve to its seat. Signed by me at Springfield, Mass.

THOMAS M LLoR;

lor adj ustably securing 

